"The Brothers" is a fantasy novella by American writer C. J. Cherryh. It was first published by DAW Books in 1986 in Visible Light, a collection of her short fiction, and was republished in 2004 in The Collected Short Fiction of C. J. Cherryh. The story draws on Celtic mythology and includes the realm of Faery and the fay race of the Sídhe. Cherryh's 1994 novel Faery in Shadow is a sequel to this novella. A minor revision of "The Brothers" and a major rewrite of Faery in Shadow was self-published by Cherryh as an e-book in Faery Moon in December 2009. Plot summary "The Brothers" is a story of two valleys, Gleann Gleatharan, ruled by Cinnfhail of Dun Gorm, and Gleann Fiach, ruled by Sliabhin of Dun Mhor. Separating the two valleys is a Sidhe-wood, which Dun Gorm respectfully keeps out of, but in which Dun Mhor defiantly hunts. The Sidhe have blessed Gleann Gleatharan with peace and good fortune, but cursed Gleann Fiach with bad luck and misery. Sliabhin is also cursed by the Sidhe for committing fratricide, killing his older brother Gaelan to seize Dun Mhor and Gaelan's queen, Moralach. Moralach had two children, Caith and later Brian, both during Gaelan's reign, but Caith was exiled soon after birth to live with Gaelan's cousin Hagan of Dun na nGall. After Sliabhin became king, Moralach hanged herself. Caith grows up believing that Gaelan is his father and when he learns that Sliabhin murdered Gaelan, and that he has a younger brother, now in Sliabhin's hands, he returns to revenge his father's death and rescue Brian. As he passes through Gleann Gleatharan, he is told that Sliabhin raped Moralach and is his real father; this increases his resolve to rid Dun Mhor of Sliabhin and free Brian. Cinnfhail, uneasy that Caith's meddling may disturb Gleann Gleatharan's peace, reluctantly lends Caith his fay horse Dathuil. Dathuil takes Caith straight to the Sidhe wood where he meets Nuallan, of the Sidhe Fair Folk, and Dubhain, a mischievous shapeshifting pooka. They bargain with Caith, who ends up losing everything he has, including Dathuil, in exchange for their help in overthrowing Sliabhin and freeing Brian. Caith and Dubhain, alternating between a black horse and a boy, set off for Dun Mhor. Meanwhile, Cinnfhail's son, Raghallach, rides to the Sidhe-wood to find and assist Caith, but is stopped by Nuallan. At Dun Mhor, Caith